Is this crab spider possibly poisonous?
Thank you for the image.
Crab spiders (Misumena species) are not poisonous to people or pets. They often sit in the center of daisy-like flowers with their first pair outstretched as they wait for insects to visit the flower.
See "Spiders Commonly Found in Gardens and Landscapes," Once there, click on the first image at the left under the heading Wandering Spiders. - http://web.pdx.edu/~smasta/MastaSpidersYard.html